using System;
using System.Collections.Generic;
using System.Globalization;
using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Linq
{
	/// <summary>
	/// Represents a JSON constructor.
	/// </summary>
	public class JConstructor : JContainer
	{
		private string _name;

		private readonly List<JToken> _values = new List<JToken>();

		/// <summary>
		/// Gets the container's children tokens.
		/// </summary>
		/// <value>The container's children tokens.</value>
		protected override IList<JToken> ChildrenTokens => _values;

		/// <summary>
		/// Gets or sets the name of this constructor.
		/// </summary>
		/// <value>The constructor name.</value>
		public string Name
		{
			get
			{
				return _name;
			}
			set
			{
				_name = value;
			}
		}

		/// <summary>
		/// Gets the node type for this <see cref="T:Newtonsoft.Json.Linq.JToken" />.
		/// </summary>
		/// <value>The type.</value>
		public override JTokenType Type => JTokenType.Constructor;

		/// <summary>
		/// Gets the <see cref="T:Newtonsoft.Json.Linq.JToken" /> with the specified key.
		/// </summary>
		/// <value>The <see cref="T:Newtonsoft.Json.Linq.JToken" /> with the specified key.</value>
		public override JToken this[object key]
		{
			get
			{
				ValidationUtils.ArgumentNotNull(key, "key");
				if (!(key is int))
				{
					throw new ArgumentException("Accessed JConstructor values with invalid key value: {0}. Argument position index expected.".FormatWith(CultureInfo.InvariantCulture, MiscellaneousUtils.ToString(key)));
				}
				return GetItem((int)key);
			}
			set
			{
				ValidationUtils.ArgumentNotNull(key, "key");
				if (!(key is int))
				{
					throw new ArgumentException("Set JConstructor values with invalid key value: {0}. Argument position index expected.".FormatWith(CultureInfo.InvariantCulture, MiscellaneousUtils.ToString(key)));
				}
				SetItem((int)key, value);
			}
		}

		internal override int IndexOfItem(JToken item)
		{
			return _values.IndexOfReference(item);
		}

		internal override void MergeItem(object content, JsonMergeSettings settings)
		{
			JConstructor jConstructor = content as JConstructor;
			if (jConstructor != null)
			{
				if (jConstructor.Name != null)
				{
					Name = jConstructor.Name;
				}
				JContainer.MergeEnumerableContent(this, jConstructor, settings);
			}
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> class.
		/// </summary>
		public JConstructor()
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> class from another <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> object.
		/// </summary>
		/// <param name="other">A <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> object to copy from.</param>
		public JConstructor(JConstructor other)
			: base(other)
		{
			_name = other.Name;
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> class with the specified name and content.
		/// </summary>
		/// <param name="name">The constructor name.</param>
		/// <param name="content">The contents of the constructor.</param>
		public JConstructor(string name, params object[] content)
			: this(name, (object)content)
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> class with the specified name and content.
		/// </summary>
		/// <param name="name">The constructor name.</param>
		/// <param name="content">The contents of the constructor.</param>
		public JConstructor(string name, object content)
			: this(name)
		{
			Add(content);
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> class with the specified name.
		/// </summary>
		/// <param name="name">The constructor name.</param>
		public JConstructor(string name)
		{
			if (name == null)
			{
				throw new ArgumentNullException("name");
			}
			if (name.Length == 0)
			{
				throw new ArgumentException("Constructor name cannot be empty.", "name");
			}
			_name = name;
		}

		internal override bool DeepEquals(JToken node)
		{
			JConstructor jConstructor = node as JConstructor;
			if (jConstructor != null && _name == jConstructor.Name)
			{
				return ContentsEqual(jConstructor);
			}
			return false;
		}

		internal override JToken CloneToken()
		{
			return new JConstructor(this);
		}

		/// <summary>
		/// Writes this token to a <see cref="T:Newtonsoft.Json.JsonWriter" />.
		/// </summary>
		/// <param name="writer">A <see cref="T:Newtonsoft.Json.JsonWriter" /> into which this method will write.</param>
		/// <param name="converters">A collection of <see cref="T:Newtonsoft.Json.JsonConverter" /> which will be used when writing the token.</param>
		public override void WriteTo(JsonWriter writer, params JsonConverter[] converters)
		{
			writer.WriteStartConstructor(_name);
			foreach (JToken item in Children())
			{
				item.WriteTo(writer, converters);
			}
			writer.WriteEndConstructor();
		}

		internal override int GetDeepHashCode()
		{
			return _name.GetHashCode() ^ ContentsHashCode();
		}

		/// <summary>
		/// Loads an <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> from a <see cref="T:Newtonsoft.Json.JsonReader" />. 
		/// </summary>
		/// <param name="reader">A <see cref="T:Newtonsoft.Json.JsonReader" /> that will be read for the content of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" />.</param>
		/// <returns>A <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> that contains the JSON that was read from the specified <see cref="T:Newtonsoft.Json.JsonReader" />.</returns>
		public new static JConstructor Load(JsonReader reader)
		{
			return Load(reader, null);
		}

		/// <summary>
		/// Loads an <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> from a <see cref="T:Newtonsoft.Json.JsonReader" />. 
		/// </summary>
		/// <param name="reader">A <see cref="T:Newtonsoft.Json.JsonReader" /> that will be read for the content of the <see cref="T:Newtonsoft.Json.Linq.JConstructor" />.</param>
		/// <param name="settings">The <see cref="T:Newtonsoft.Json.Linq.JsonLoadSettings" /> used to load the JSON.
		/// If this is null, default load settings will be used.</param>
		/// <returns>A <see cref="T:Newtonsoft.Json.Linq.JConstructor" /> that contains the JSON that was read from the specified <see cref="T:Newtonsoft.Json.JsonReader" />.</returns>
		public new static JConstructor Load(JsonReader reader, JsonLoadSettings settings)
		{
			if (reader.TokenType == JsonToken.None && !reader.Read())
			{
				throw JsonReaderException.Create(reader, "Error reading JConstructor from JsonReader.");
			}
			reader.MoveToContent();
			if (reader.TokenType != JsonToken.StartConstructor)
			{
				throw JsonReaderException.Create(reader, "Error reading JConstructor from JsonReader. Current JsonReader item is not a constructor: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
			}
			JConstructor jConstructor = new JConstructor((string)reader.Value);
			jConstructor.SetLineInfo(reader as IJsonLineInfo, settings);
			jConstructor.ReadTokenFrom(reader, settings);
			return jConstructor;
		}
	}
}
